3D40.18 - Musical Ruler - Musical Strips

Hold the ruler at different points and let the ruler vibrate.  Listen to the different pitches corresponding to length.
The resonance box should have one octave+ of pitches.
A common hacksaw blade also makes a very good vibrating strip.
Code Number:
3D40.18
Demo Title:
Musical Ruler - Musical Strips
Condition:
Excellent
Principle:
Resonance in Solids
Area of Study:
Acoustics
Equipment:
Yard stick, resonance box with attached strips.
Procedure:

Hold the ruler at different points and let the ruler vibrate.  Listen to the different pitches corresponding to length. 

The resonance box should have one octave+ of pitches.

A common hacksaw blade also makes a very good vibrating strip.

References:
  • Blane Bakeer, Maggie Sherer, Ben Mossinghoff, Will Laycock, "Video Analysis of an Oscillating Cantilever for Introductory Laboratories", TPT, Vol. 60, #4, April 2022, p. 270.
  • Hendra Jaya Tarigan, "Sound Wave Propagation From Underdamped Free Oscillation of Metallic Cantilever Beams", TPT, Vol. 60, #1, Jan. 2022, p. 66.
  • Michael Liebl, "Saw Blades and Resonance", TPT, Vol. 43, # 3, May 2005, p. 282 - 284.
  • R.D. Edge,  "Vibrating Meterstick",   TPT, Vol. 25, # 2, p. 98, Feb. 1987.
  • Keith Turvey,  "An Undergraduate Experiment on the Vibration of a Cantilever and Its Application to the Determination of Young's Modulus",  AJP, 58, # 5, May 1990.
  • M-900:  "Hacksaw Blade - Meter Stick",  DICK and RAE Physics Demo Notebook.
  • Borislaw Bilash II, David Maiullo, "Good Vibrations", A Demo a Day: A Year of Physics Demonstrations, p. 216.
  • "The Science of Sound", The Boy Scientist, p. 176.
  • Janice VanCleave, "Twang", 201 Awesome, Magical, Bizarre, & Incredible Experiments, p. 91.

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